Metal-drawing apparatus



April 24, 1928. 1,667,387

- D. c. KINNEAR METAL DRAWING APPARATUS Filed May 14, 1927 s Shets-Sheet1 l! I 'IUHI I MUD INVENTOR.

W ATTORNEYS.

April 24, 1928.

D. c. KINNE AR METAL DRAWING APPARATUS 3 Sheets-Sheet 2 Filed May 14.1927 f 5 INVEN TOR.

ATTORNEYS.

April 24} 1928. 1,667,387 I D. c. KINNEAR I METAL DRAWING APPARATUSFiled May 14, 1927 5 Sheets-Sheet 5 d) INVENTOR.

A TTORNEYS.

the work to be drawn.

DELAMAR C. KINNEAR, OF WATERBURY,

1,667,387 PATENT OFFICE.

oommc'rrcn'r, ASSIGNOB, BY mnsma AS- SIGNMENTS, TO THE AMERICAN BRASSCOMPANY, OF WATERBURY, CONNECTICUT,

A CORPORATION OF CONNECTICUT.

METAL-DRAWING APPARATUS.

Application med ma 14,

My invention relates to metal drawing apparatus and has for its objectto PIOVldO a new and improved drawing apparatus. It further has for itsobject to provide a draw 5 ing apparatus having a split drawing die theparts of which are permanently connected to said apparatus. It furtherhas for its object to provide a new and improved Wedging clamp forholding a portion of It further has for its objectto provide anapparatus having a plurality of split drawingdies coactlng with a die.holder and permanently connected to the apparatus so that any one of thedrawing dies can be introduced into the die holder. It further has forits object a hand operated drawing tool having any one or all of theabove features. 7

The following is a description of an embodiment of my invention,reference being had to the accompanying drawings, in which:

Figure 1 is a side elevation of a hand operated tool embodying myinvention;

Fig. 2 is an end elevation of the same;

Fig. 3 is a section on'the line 33, Fig. 1;

Fig.4 is a section on the line 44, Fig. 1;

Fig. 5 is a section on the line 5-5, Fig. 3;

Fig. 6 is a section on the line 6-6, Fig. 1;

.Fig. 7 is an end elevation of the dies and die holder, together withthe supporting and alining means; v

Fig. 8 is a section of the same on the line 8-8, Fig. 7;

Fig. 9 shows a modified form of carrier and three pairs of die partscarried thereby; FFig. 10 is a section on the line 10-10, 1g. 9;

Fig. 11 shows a construction similar to that of Fig. 9, with differentalining means substituted; and 1 .Fig. 12 is a section on the line 1212,Fig. 1:1.

Referring more particularlyto the drawings, 2 is 'a support for a slide4 carried thereby and having a die holder or socket 6 for a two-partdrawing die 8. The two parts of this drawin die are secured by screws toarms 9 pivotall connected at 10-10 to a die carrier 12 w ich is mountedto slide upon a bearing 14 carried by the dieholder sothat it can bemoved toward or from the die holder. This carrier, as it apparts of thedie are held in 1927. Serial No. 191,522.

preaches the die holder, is alined relatively to the die holder by a pin16 carried by the die holder. The portions of the die have rearwardextensions 18 which, when the die is closed and the carrier is movedtoward the die holder, enter the recess 20 in the die holder. This dieholder is open at one side as shown at 22 so that when the die carrieris retracted and the die is opened, a wire, tubing or the like can beintroduced into the opened die through the opening 22. After the wire,tubing or the like is so introduced, the die is closed and the carrier 8is moved toward the die holder until the projections 18 enter the recess20, whereupon the two drawing posit1on. I

Mounted upon the support 2 or integrally formed therewith are the sides24 of a holder for clamping jaws 26. These jaws are held between thesides 24 by plates 28 secured to said sides 24. The inner surfaces ofthe sides 24 are inclined toward one another in the direction of the dieholder 6 and the jaws 26 have external sides inclined toward one anotherand engaging the inclined sur faces, of said sides 24. One of the jaws26 has secured to it the plate 30 projecting transversely and slidingwithin a transverse groove in the other jaw 26 so as to maintain theinner faces of the jaws parallel to one another. The plates 28 have ontheir inner surfaces longitudinally extending projections 32 which slidein the grooves in the outer faces of the jaw members, said grooves beinginclined toward one another and parallel to the inner surfaces of theside walls 24 so that when the jaws are retracted they are caused toseparate and when they are moved in the direction of the die holder arepermitted to approach oneanother under the influences of theinclinedsides 24 and clamp ward movement ofuthe 'aws.

- The slide 4 is provide with ratchet teeth 36, and. if cylindrical, isprovided with a lon' itudinal slot into which extends a pin 38fordlolding it against rotation while-permitting longitudinal movement.Integral with the support 2 is a hand grip handle and pivoted to saidsupport at 42 is a movable handle 44 to which is pivotally connected apawl 46 which is normally held in engagement with the rack 36 by aspring 48. As

the handle 44 is oscillated relatively to the handle 40, the pawlengaging successive teeth on the ratchet 36 causes the slide to move thedie holder away from the clamp, this being more fully described in myearlier application Serial No. 177,529, filed March 23, 1927, on'theapparatus of which the present invention constitutes an improvement.

l/Vith the construction described there is no danger of dropping eitherof the die members and the die members are easy to manipulate, which isparticularly desirable in cold weather. Furthermore, the clamp does notrequire any clamping screw, the clamping action being automatic afterthe jaws have been brought into contact with the member to be clamped.Furthermore, the wire or tubing can be laid directly between the splitdie portions and the jaws of the clamp, on account of the opening 22 andthe opening between theplates 28.

It is oftentimes desirable to have at hand a plurality of dies ofdifferent sizes or to have a plurality of dies of the same size, whichcan be replaced one for another in case a set of dies becomes worn. Inorder to accomplish this end I provide a special form of carrier 50,shown in Fig. 10, to which parts of three split dies 52, 54 and 56 arepivotally connected, these dies being of the same size or differentsizes as desired. With this form of carrier the alining pin is madeshorter, as shown at 58, so that when the carrier is advancedsufficiently to withdraw the rearwardly extending ,portions 60 from thedie-holder, the carrier, together with the dies, can be revolved aboutthe bearing 62 so as to bring any one of the three dies opposite theopening in the die holder. The carrier I is provided with three holes 64into any one of which the guide pin 58 can enter, these holes being sopositioned that when the pin 58 is within any one of them one of thepairs of split dies is properly alined so that when closed itsrearwardly extending parts can be moved into the recess in the dieholder.

In the form shown in Figs. 11 and 12 the bearing 66 for the carrier isprovided with an angular surface 68 whose sides are tanential with thecylindrical portion of the bearing and adapted to engage the sides of acorresponding opening in the die carrier, and act to aline it so as toaline any one of the dies opposite the opening in the die holder. Asidefrom this alining feature, the

' construct-ion is substantially the same as that of Figs. 9 and 10.

In operating the tool, the carrier is moved so as to withdraw the diefrom the die holder, permit-ting it to open .and the jaws 26 areretracted to open position, the slide 4 being retracted so as to bringthe die holder 6 up to the jaw holder carried by the support 2. Theobject to be drawn is then placed between both the separated die membersand the separated jaw members and the carrier is moved toward the dieholder, the die being closed, until the rearward extensions on the diemembers are/within the recess in the die holder. The jaws of the clampare then closed and the handle 44 is then actuated so as to cause thepawl 46" to propel the slide 4 and move the-die holder, together withthe die, away from the support 2 with its clamp, this action beingcontinued until the desired drawing operation is effected.

The tool is specially adapted for drawing a tubular member placed uponthe two ends of a, wire or cable so as to couple the two ends together.When the tool has been operated long enough to move the dies beyond theend of the tubular member, the coupled wire can be easily removed fromthe dies and clamp, which are in that operation restored tit) to initialposition, so that after the slide is retracted't-he apparatus is readyto receive and act upon another tubular member.

As will be evident to those skilled in the art, my invention permits ofvarious modifications without departing from the spirit thereof or thescope of the appended claims.

What I claim is:

1. A drawing apparatus comprising a clamp, an open sided die holder,means for moving said die holder away from said clamp, in combinationwith a splitdie the two parts of which have extensions adapted to entersaid die holder, a carrier to which said parts are pivoted, and meanscarried by said die holder along which said carrier is slidable towardand from said die holder.

2. A drawing apparatus comprising a clamp, an open sided die holder,means for moving said die holder away from said clamp, in combinationwith a split die the two parts of which have extensions adapted to entersaid die holder, a carrier to which said parts are pivoted, meanscarried by said die holder along which said carrier is slidable towardand from said die holder, and means for alining said carrier so as toalinc said die with the die holder when said die is closed and movedtoward said die holder.

3. A drawing apparatus comprising a clamp, an open sided die holder,means for moving said die holder away from said clamp, in combinationwith a plurality of split dies each die havin two parts provided withextensions adaptec l to enter said die holder, a carrier to which saidparts are pivoted, a bearing carried by said die holder about which saidcarrier is rotatable and along which it is s-lidable to permit theintroduction and withdrawal of the extensions pivoted, a bearing carriedby said die holder about which said carrier is rotatable and along whichit is slidable to permit the introduction and withdrawal of theextensions on any pair of die sections into or out of said die holder,and indexing. means engaging said carrier for holding any ofsaid dieswhen closed in line with said holder when moved toward said holder.

5. A drawing apparatus comprising a clamp, an open sided die holder,means for moving said die holder away from said clamp, in combinationwith a plurality of split dies, each die having two parts provided withextensions adapted to venter said die holder, a carrier to which saidparts are pivoted, a bearin carried by said die holder about which saicarrier is rotatable and along which it is slidable to permit theintroduction and withdrawal of the extensions of any pair of dies intoor out of said die holder, and indexing means engaging said carrier forholding any of sai 'es when closed in line with said holder when movedtoward said holder, said indexing means comprisin surfaces out ofalinement with the axis 0 said bearing.

6. A drawing apparatus comprising a clamp, an 0 en sided the holder,means for moving sai die holder away from said clamp, in combinationwith a clamp having jaws separable along a plane passing throng theopening in the side of said die holder, and agaw holder having anopening located in sai plane.

7.. A drawing apparatus comprising a clamp, an o n sided die holder,means for moving sai die holder away from said clamp, in combinationwith-a clamp havin jaws separable along a plane passinglthroug theopzning in theside of said die older, a jaw lder having an openinglocated in said plane, said jawholder and jaws having angularly disposedsurfaces, and'means for holding the o posed faces of said jaws parallelduring t e opening and closing movements of said jaws.

8. A drawing apparatus comprising a clamp, an open sided die holder,means for moving said die holder away from said clamp, in combinationwith a clamp having jaws separable along a lane passing throng theopening in the si e of said die holder,-. and a jaw holder having anopening located in said plane, said jaws and jaw holder havingangu'larly disposed guiding surfaces converging toward said die holderacting to separate said jaws when said jaws are retracted.

9. A drawing apparatus comprising a clamp, an 0 en sided die holder,means for moving said die holder away from said clamp, in combinationwith a clamp having jaws separable along a lane passing through theopening in the side of said dle holder, means for maintaining theopposing faces of said jaws parallel and opposite to one another, a jawholder havin an openin located in said plane, said aws and ja holderhaving angularly disposed guiding surfaces converging toward said dieholder acting to separate said jaws when said jaws are retracte and ahandle connected to one jaw for retracting said jaw.

10. A drawing apparatus comprising a clamp, an o n sided die holder,means for moving sai die holder away from said clamp, in combinationwith a plurality of split dies, each die havin two parts provided withextensions adapte to enter said die holder, a carrier to which. saidarts are pivoted, a bearing carried by said 'e holder about which saicarrier 1s rotatable and along which it is slidable to permit theintroduction and withdrawal of an of said extensions into or out of saidd1e holder, an indexing pin engaging said carrier for holding any ofsaid dies when closed'in line with said holder when moved toward saidholder, said indexing pin being carried by said die holder and locatedeccentrically to said bearing.

In testimony whereof, I have signed my I name tothis specification this11th day of May, 1927. v

DELAMAB C. KINN'EAR.

